The Yale Law Journal


Insider Trading’s Legality Problem

19 Jun 2017

abstract. In late 2016, in its highly-watched decision in Salman v. United States, the Supreme Court attempted once again to clarify the crime of insider trading, this time regarding the secondary and tertiary recipients of information commonly referred to as “remote tippees.” In doing so, the Court seemed to put to rest any question that a person who “gifts” a friend or family member with material non-public information for the purposes of trading on such information does in fact trigger a violation of law. As cases go, Salman is relatively straightforward. Nevertheless, it demonstrates several of the drawbacks that arise when criminal laws become the product primarily of cases and not statutes. Ordinarily, proponents of legislative law-making cast their arguments in fairness terms, as written statutes provide advance warning of what is and is not forbidden. This Essay contends that legislatively enacted statutes go further than that. Under the best circumstances, they can improve the content of criminal law precisely because they permit the legislature to differentiate similar yet morally distinct conduct. With this benefit in mind, the Essay imagines what insider trading law might look like were Congress to both define and subdivide the crime of insider trading into the kind of tiered or degreed crimes more routinely featured in state codes.


Consider the following hypothetical:

John calls his brother, Paul, and tells him that he has ten kilograms of cocaine, each of which is worth more than twenty-five thousand dollars. Paul eagerly asks John to share several kilos so that he can sell them and make some money too. Although John initially demurs, he eventually relents and gives three kilos to his brother. Paul, in turn, calls his friend, Sam, relaying his good fortune and inquiring if Sam wishes to join in the sale. Sam eagerly accepts Paul’s offer and sells some of the cocaine, taking care to mask the proceeds.

Under the federal narcotics laws, John, Paul, and Sam have each conspired to distribute a controlled substance.1 In determining whether a conspiracy exists, a fact-finder would ask whether two or more persons agreed to distribute a controlled substance and whether each of the charged defendants joined the agreement. Although John and Paul’s familial relationship might be of interest to a jury, it otherwise would be of no legal significance. Nor would we worry too much about John’s underlying motivation for sharing the cocaine with his brother. Whether John expected a tangible benefit from Paul or acted out of altruistic brotherly love, the two brothers would still be guilty of narcotics trafficking and conspiracy to traffic in narcotics, as would their friend Sam.2

The above hypothetical is wholly unremarkable, except for the fact that its insider trading analogue, Salman v. United States,3 triggered substantial scholarly discussion, capped by a relatively narrow Supreme Court opinion in December 2016.4 The case involved a Citibank employee, Maher Kara, who wrongfully disclosed material nonpublic information to his brother, Michael Kara, recognizing that Michael intended to trade on it for his own benefit.5 Michael subsequently shared the information with his friend, Bassam Salman, a friend and brother-in-law of Maher Kara.6 Salman traded on the information, taking care to conceal his wrongdoing by running the trades through a brokerage account in someone else’s name.7

Had the three men conspired to distribute cocaine, their case would have been no candidate for certiorari, much less sustained scholarly inquiry. Because Salman conspired to profit from his brother-in-law’s non-public material information, however, his case served as yet another reminder of the ways in which insider trading law has morphed from a single theory of fiduciary violation into a thicket of complex and interlocking judicial doctrines.8

On a more practical level, Salman’s case enabled the Supreme Court to clarify insider trading law’s application to “remote tippees,” those traders who indirectly receive information from corporate insiders but otherwise play no direct role in the insider’s violation of fiduciary duty.9 Just a few years earlier, the Second Circuit had concluded in United States v. Newman that where a third party indirectly received material nonpublic information from an insider, the third party could not be prosecuted for trading on such information unless he was aware that the insider received a personal benefit “of some consequence” in exchange for passing along such information.10

That proof of such a benefit might serve as a prerequisite for liability illuminates the wide gulf between insider trading and federal conspiracy law. Consider again the hypothetical drug trafficker. No jury instruction would demand evidence that a drug dealer received a pecuniary benefit from his decision to share kilograms of cocaine with another. Rather, the inquiry would focus almost exclusively on the presence or absence of an agreement to distribute the illicit substance—a so-called meeting of minds.

Fortunately for prosecutors, Salman put to rest the notion that any such benefit would be a prerequisite to finding criminal liability, at least in those cases where the inside information had been provided by a family member or friend.11 What the Salman decision did not do, unfortunately, is take seriously the extent to which insider trading law falls short of criminal law’s legality principle. The principle encompasses two distinct but related concepts.12 First, criminal prohibitions should be set forth with sufficient clarity to inform citizens in advance of what is prohibited; second, and of more importance in this context, crime creation is reserved solely for the legislature.13 Judges do not make crimes; legislatures do.14

Justice Alito’s opening line in Salman tells us that “Section 10(b) of the Securities Exchange Act of 1934 . . . prohibit[s] undisclosed trading on inside corporate information by individuals who are under a duty of trust and confidence that prohibits them from secretly using such information for their personal advantage.”15 Future jurists and practitioners will indubitably appreciate this pithy recitation, but it rests primarily upon the Court’s inference as to what Congress meant when it banned the use of “manipulative or deceptive devices” in Section 10(b).16 Neither Section 10(b), nor even the SEC’s subsequently promulgated Rule 10b-5,17 explicitly define the conduct known as “insider trading.”18 To the contrary, the content of that prohibition is best mined by reading a series of cases, notably the Supreme Court’s trio of oft-cited opinions: Chiarella v. United States,19 Dirks v. SEC,20 and United States v. O’Hagan.21

For those familiar with other areas of law, this common-law approach is neither surprising nor problematic. But Salman involved a criminal prosecution, and when we deal with criminal law, we expect statutes to play the starring role in legal analysis.22 For other types of offenses, criminal law more or less satisfies this expectation.23 Insider trading law’s legislative source, however, is a cypher.24 Accordingly, Salman is best viewed not as a case about remote tippees, much less the passage of information among friends and family members; rather, it is a case that highlights the value of legislatively driven crime-definition, particularly definitions that aim to differentiate misconduct and not simply to prohibit it.

Employing Salman as its backdrop, the remainder of this Essay considers the ways in which insider trading law might be strengthened by the adoption of a series of criminal statutes that define and differentiate degrees of insider trading. Part I considers the legality principle’s boundaries and relationship to insider trading. Part II highlights several of the drawbacks inherent in piecemeal or “common law” criminal lawmaking. Finally, Part III imagines how insider trading law might change were Congress to undertake the task of both defining and subdividing this offense into several or more crimes.

I. locating the legality principle’s boundaries

The Latin phrase nuna poena sine lege (“no penalty without a law”)reflects the principle that a person cannot be punished for something that has not been formally prohibited in advance.25 Accordingly, an individual cannot be prosecuted or punished criminally for behavior that has not been proscribed in advance by statute.26 The principle is grounded in both due process and separation-of-powers concerns.27 The executive enforces the law and the judiciary interprets it, but the legislature tells us in the first instance which behavior is forbidden and the range of punishments that the government may impose.28 The principle thus reflects the intuition that the democratically elected legislature is the sole body competent to declare in the first instance, on the state’s behalf, what is and is not a crime.29

Notwithstanding the foregoing, even though states have banished most common-law crimes30 and federal courts insist that “criminal common law” does not exist,31 one can easily point to any number of judge-developed doctrines that curtail or extend criminal liability. For example, the state of Tennessee, like other states, outlaws homicide by statute. For years, however, its courts employed the hoary “year and a day rule,” which defined murder as a death occurring within a year and a day of a defendant’s conduct.32 “Murder” was prohibited by statute, but the “year and a day rule” was derived from Tennessee’s common law precedent. Not only did the Supreme Court take no issue with this delegation of responsibility, but it also took no issue with the Tennessee Supreme Court’s eventual decision to retire it, provided that the change in law was reasonably foreseeable to the defendant.33

One can find similar examples in the federal context. The federal criminal code prohibits conspiracies to defraud the United States and to violate its criminal code.34 Pinkerton v. United States and its progeny, however, extend that liability to additional substantive crimes undertaken by a co-conspirator that are both foreseeable and undertaken in furtherance of the conspiracy.35 So-called Pinkerton liability arises out of the Supreme Court case for which it is named; one will not find it enshrined in some federal statute. Similarly, the state of mind known as “willful blindness” is a judge-manufactured concept that both federal and state courts accept as the equivalent of knowledge.36 Although one can easily locate the word “knowingly” throughout various criminal statutes, the “willful blindness” doctrine is a primarily a product of judicial interpretation.37

One might argue that these cases do no violence to the legality principle because they leave untouched the relevant statute’s underlying prohibition of a given type of conduct. As a result, it is difficult to say that the defendant lacked fair warning or that the legislature failed to play its proper role in defining criminal law. A defendant might have been surprised to learn that courts treat “willful blindness” as the equivalent of knowledge, but he would have had no trouble accessing the statute that outlawed the transportation of 110 pounds of marijuana in his car.38 The defendant in Rogers v. Tennessee was surely just as aware that the law prohibited homicide, even if he could not be completely certain of Tennessee’s intention to do away with the year and a day rule.39 And the defendant in Pinkerton certainly knew he was violating the tax laws by conspiring with his brother, even if he was unaware of how much additional liability his agreement would provoke.40

The lesson one might derive from the above examples is that criminal prosecution comports with the legality principle so long as the relevant statute spells out, with some minimal precision, the core behavior—that is, the conduct or result—the government wishes to prohibit. Judges can devise ancillary rules (provided that these rules are theoretically foreseeable), but legislatures must outline the relevant conduct that is prohibited in the first instance.41

Thus, we might say that the legality principle requires legislatures to define core prohibited conduct, but permits courts to fashion and revise ancillary rules. Even this modest statement, however, is less robust than we care to admit. For one thing, as Sam Buell reminds his readers, “white collar offenses are often both vaguer and broader than their street crime cousins.”42 Consider the federal mail fraud statute, which outlaws the use of the mails to perpetrate a “scheme or artifice to defraud.”43 The statute, first enacted in 1872, was subsequently amended to include language forbidding the taking of money or property using “misrepresentations or false pretenses.”44 Whatever its drafters’ original intent, prosecutors and jurists have stretched it well beyond its original “theft through deception” paradigm.45

Given the foregoing, one might wonder whether insider trading law undermines the legality principle any more than the open-ended statutes prohibiting mail or wire fraud. Certainly, if one conceptualizes federal statutes as spanning a spectrum that includes everything from the most specific crimes, up to and including broadly articulated prohibitions of undesirable behavior, insider trading clearly registers at the end of the spectrum where legislative definition is murky at best. This is particularly the case as one moves from the classic version of insider trading to the so-called misappropriation theory of liability, all the way to a discussion of criminal liability for the secondary or tertiary recipients of non-public information.

None of this is to deny the existence of federal statutes that effectively incorporate by reference the content of the Supreme Court’s insider trading cases.46 Nor is it to deny the Securities and Exchange Commission’s own gloss, through either rulemaking or its own enforcement activities, on insider trading or other securities-related evils.47 Nevertheless, for criminal prosecutions of business insiders and direct tippees (not to mention remote tippees), the Supreme Court’s trio of cases, Chiarella, Dirks, and O’Hagan, remain the primary sources from which lower courts derive insider trading’s meaning.48 And with each new recitation on what the Court really meant in Dirks (or Chiarella or O’Hagan), insider trading law’s connection to statutory language grows ever more remote.

To date, the primary complaint invoked by this dynamic is one of unwarned punishment, paired with accusations of administrative or prosecutorial overreach.49 No doubt, these concerns are relevant. But there is more that we lose when we ignore the legality principle’s teachings. As Parts II and III demonstrate, the statutory approach to criminal law is preferable not just because it provides citizens advance notice, but also because it allows for differentiation and a more holistic consideration of which conduct makes “insider trading” so undesirable that it is deserving of criminal punishment. That is, statutory lawmaking improves the content of criminal law and not just criminal law’s procedure. These benefits emerge more clearly when we consider the problems of defining criminal law in a piecemeal common law fashion, an issue I take up in Part II.

II. insider trading’s piecemeal problem

If one conceptualizes the legality principle as a spectrum between code-driven and common-law systems, one can quickly conclude that insider trading falls on the common-law side of that spectrum. This is not surprising in the case of the many regulatory prohibitions that now pervade the federal criminal code.50 Congress enacts a series of statutes, an administrative agency adds heft to them through its rulemaking and enforcement powers, and the Department of Justice selects a certain number of violations (often, the most egregious ones) for criminal prosecution. Or, to use criminal law’s familiar vocabulary, the administrative criminal law statute remains, in many cases, only half-written. The legislature defines in advance the criminal prosecution’s definition of mens rea (“willfully,” in the case of securities violations51) but leaves at least part of the definition of the crime’s actus reus to its coordinate branches.52

Insider trading law provides an instructive example of the drawbacks inherent in this practice.53 Salman itself relies most prominently on an earlier Supreme Court case, Dirks v. SEC.54 In Dirks, the Supreme Court simultaneously announced what was not illegal (trading on information disclosed by a whistleblower seeking to expose his company’s fraud), in contrast to what might be illegal (trading on information provided by someone who disclosed the information in exchange for a “personal benefit”).55 Although the Court helpfully suggested the grounds on which a jury might infer the existence of an insider’s illicit benefit,56it left unanswered a series of additional questions. This is hardly surprising. The Supreme Court opinion deciding Raymond Dirks’ civil case could only cover so much ground. That is, after all, a hallmark of the common law: courts answer questions incrementally, and usually only when directly asked.57

Since Dirks, lower courts have grappled with the question of the tippee’s knowledge of a fiduciary breach and whether this requirement should be interpreted more stringently in a criminal case.58 Indeed, mens rea was one of the driving factors in the Second Circuit’s Newman decision, which found insufficient evidence in the record that the defendants, remote tippees, were sufficiently aware of the upstream fiduciary violation that resulted in their receipt of inside information. Without that knowledge, the Second Circuit concluded, the tippees could not be said to be acting “willfully.”59 The Second Circuit then went on to opine—quite gratuitously—on the nature of the insider’s benefit. The insider’s benefit, according to the court, had to be “consequential” and of a “pecuniary or similarly valuable nature.”60

Salman depicted a contrasting set of facts. Unlike the remote tippees in Newman, the trading chain in Salman was relatively short and populated by close relatives. Salman clearly knew his brother-in-law Maher Kara had sourced the information, in clear violation of Kara’s duty to Citibank.61 Indeed, Salman and his co-conspirator (his brother-in-law’s brother) discussed shredding documents in order to protect their original source.62 So much for denying willfulness and knowledge. But the question of the tipper’s personal benefit still remained. How tangible or substantial did it have to be?

The Supreme Court answered Salman’s question firmly but narrowly. Since the original source gifted the information to a “trading relative or friend,” it fell well within Dirk’s heartland and was conceptually no different from the insider who exploited private information and gifted one of his friends with the proceeds.63 With that conceptual puzzle out of the way, Justice Alito practically scoffed at Salman’s remaining rule of lenity and vagueness claims.64 Lenity requires ambiguity, but according to Justice Alito, Dirks was far from ambiguous; to the contrary, Dirks explicitly envisioned trading violations premised on the provision of information to friends or family members.65 Thus, Salman’s prosecution was proper, and Newman’s personal benefit test itself seemed bound for the shredder.

However one feels about Justice Alito’s reasoning, Salman aptly demonstrates the limitations inherent in the “fair warning” argument that often undergirds lenity and vagueness claims. At least in this case, it is easy to say that Salman should have known better; in fact, he did know better, as he made various efforts to cover his tracks.66 Nevertheless, Salman provides relatively little guidance for those situations that lie outside Dirk’s so-called heartland. It does not address, for example, the question of gratuitous tipping outside the “friends and family” relationship. Nor does it clarify whether tippees must possess actual knowledge of an upstream breach (as was true of Salman) or whether something akin to reckless suspicion would suffice for criminal liability. To learn the definitive answer to these questions, one will need to wait.

The common law’s standard methodology of advancement of legal obligations by judicial reasoning and analogy is well accepted in many contexts.67 Contemporary criminal law, however, frowns upon the practice,68 in part because the judicial prohibition of conduct by analogy offends the notion that losses of liberty should be carefully circumscribed by democratically accountable legislatures.69 Recall the hypothetical that opened this Essay. Imagine that Congress, in enacting the Controlled Substances Act, had promulgated a single-sentence statute prohibiting the “intentional” distribution of any “controlled substance,” without further defining what it meant by “controlled substance.” Would we be content with a system that defined “controlled substance” incrementally, telling us in one opinion that “heroin” was a controlled substance, but waiting several more years to tell us that caffeine was not?70

Legislatively enacted statutes do more than provide advance notice. Under the best circumstances, when they form part of a coherent penal code, they reflect the legislature’s attempt to consider a set of crimes deliberately and all at once.71 The story of the Model Penal Code and the enactment of state penal codes across the country during the latter half of the twentieth century is a story, at least on some level, of deliberation and foresight.72 Legislatures across the country attempted to reform their criminal codes and, in doing so, confronted basic questions about mens rea, its relation to certain crimes such as homicide, and more generally, overriding concepts such as conspiracy, complicity and attempt.73

Concededly, the federal code is hardly as well-thought-out as either the Model Penal Code or its state counterparts. Title 18 combines redundant and overlapping statutes, while declining to define basic terms consistently.74 Still, one would rather a sloppy criminal code than no code at all. More importantly, one would vastly prefer a reflective, all-in-one consideration of insider trading law’s possible iterations (subject, of course, to updating and amendment), than make do with the path-dependence and uncertainty that arises out of a piecemeal approach.

One might conclude that a political economy narrative partially explains the distinction between insider trading law and other provisions of the federal criminal code. For example, a sustained effort to define insider trading would almost certainly bring to the fore white-collar crime’s so-called “privilege problem.”75 Imagine that Newman’s personal benefit rule were the subject of open debate by elected officials. If drug dealers and other conspirators in federal crimes can be found guilty of violating the law merely by agreeing to engage in a crime, why should tippees accused of insider trading enjoy the benefit of an additional element, such as proof of a pecuniary benefit? Elected officials could certainly respond by citing the need for a rule that adequately defines the tippee’s derivative obligation not to trade, but the very act of doing so would risk political capital. No wonder, then, that Congress has been more or less content to leave the hard work to comparatively insulated Article III judges.

Curiously, so too has the SEC, albeit for other reasons. The jurist who has most keenly observed insider trading’s legality problem is Judge Jed Rakoff, the federal judge in the Southern District of New York who, coincidentally, sat by designation on the Ninth Circuit panel that decided Salman and pointedly declined to follow Newman.76In an earlier insider trading case, United States v. Whitman,77 Judge Rakoff bluntly blamed the SEC for insider trading law’s bumpy trajectory:

Other nations have proposed and, in some cases, enacted laws of general applicability against insider trading. Congress, however, has never done so, partly because the SEC has generally opposed such proposals on the ground that that any statutory definition of illegal insider trading would inevitably create “loopholes” that would be eventually utilized in much the same way that the tax code generates tax “dodges” that are frequently successful.78

Donna Nagy, decidedly more sympathetic to the SEC’s plight than Judge Rakoff, has praised Congress for avoiding any explicit definition of insider trading. In a pre-Salman discussion of tippee liability, Nagy writes: “Congress’s determination to build on top of the Supreme Court’s precedents, rather than start anew with a legislative definition of insider trading, was a well-considered decision that deserves both acknowledgement and respect.”79 Like the SEC, Nagy also fears that market actors would seek out and exploit loopholes in any explicit statutory definition of insider trading.80

Ultimately, this avoidance-of-loopholes argument proves too much. First, as Judge Rakoff points out, one can just as easily generate loopholes in a judicially defined prohibition as in a legislatively enacted one.81 Second, all written statutes are vulnerable to the so-called loophole problem. Particularly in federal jurisdictions, criminal law threatens many of its targets with potentially life-altering deprivations of liberty. Despite those stakes, we not only adhere to the legality principle, but we robustly embrace it. Notwithstanding our fears that criminal defendants will skirt legislatively defined terms, we still commit to identifying—in written form—the very elements we believe to be the components of homicide, rape, robbery, or even tax evasion.82 If all of these other crimes can somehow withstand the loophole threat, then surely so too can insider trading.

As I have tried to show throughout this Part, there are drawbacks to the type of piecemeal lawmaking typified by the Supreme Court’s insider trading jurisprudence, particularly in regard to criminal law. Criminal law’s content benefits, both expressively and practically, from legislative deliberation. More importantly, as I explain in Part III, legislatures are capable of doing something that judges are not: breaking down a single crime into a series of graded crimes.

III. differentiating insider trading

What does one gain by forcing the legislature to articulate on the record exactly what it means by the term “insider trading”? Besides providing citizens some advanced indication of what is forbidden, statutory proscription’s less-heralded benefit is its ability to subdivide criminal behavior. By placing the onus for criminal law-making squarely on the legislature, the legality principle provides the mechanism and opportunity for differentiating a string of similar yet morally distinct actions.83 A decentralized court system cannot easily or reliably subdivide the criminal category of “homicide” into four or five distinct offenses, and an administrative agency lacks the moral and legal imprimatur of authority to perform this feat.84 A democratically elected legislature, as demonstrated by the state legislatures throughout the country who have revised and updated their criminal codes, is uniquely situated to perform this task.

With regard to insider trading, a legislative code could go far beyond answering vexatious questions such as the remote tippee’s requisite mens rea with regard to his knowledge of a fiduciary duty violation. Were Congress to promulgate an insider trading statute, it could use such an occasion as an opportunity to distinguish different types of trading in terms of harm and moral wrongfulness. It could tether these subdivisions to an individual’s mens rea, to the qualitative or quantitative nature of harm caused, or to some combination of the two.

For example, one might imagine a very simplistic three-tiered statute, matched to increasingly severe maximum ranges of imprisonment. For the highest tier—call it Aggravated Insider Trading—we might reserve punishment for serial violators or ringleaders of insider trading schemes, such as Raj Rajaratnam.85 A second, catch-all tier—Insider Trading—could punish those who knowingly and intentionally trade on information known to be disclosed in violation of a fiduciary or contractual duty. And finally, a third tier, perhaps a misdemeanor—Reckless Trading—could attach to those remote traders who ignored a substantial and unjustifiable risk that they were trading in information obtained in violation of a fiduciary duty.86

There are, of course, other ways to subdivide insider trading. We might view initial tippers more negatively than direct and secondary tippees. Or we might feel that insiders and direct tippees are equally deserving of condemnation, but secondary and tertiary tippees less so. We might distinguish “buyers and users” of information from “sellers” of information. Finally, we might view as worthy of special distinction the CEO or high-level corporate officer who exploits a corporate opportunity and harms his corporation.

Many readers will blanch at some or all of these suggestions. That is indeed the point. A legislatively enacted statute would force members of Congress to openly debate these distinctions. At the same time, a well-constructed statutory scheme could punish and prohibit all of these betrayals, while distinguishing them in gradations of harmfulness and moral wrongfulness. That is, after all, what our homicide, robbery and theft statutes do. The typical graded statute, ubiquitous throughout state penal codes but largely absent in the federal fraud context, punishes a wide swath of misconduct while matching the worst conduct with harsher mandatory and permissible punishments.87 It may not do this flawlessly, but it at least conveys, in some understandable form, the difference between the worst and the less worse offenses within a given category.

Whatever the common law’s flexibility in addressing new issues and preventing loopholes, its capacity for graded lawmaking is severely limited. Moreover, it focuses the debate almost exclusively on a question whose answer is a binary yes or no: “Is X behavior a form of Y crime?” A statutory framework shifts the focus of debate. Instead of asking “What is insider trading?” or “Is X ‘insider trading’?”, we ask “Which activities do we wish to deter and prohibit?” and “Which of these activities do we find more dangerous and/or deserving of condemnation?” These latter questions are at once more productive and more valuable than the interminable back and forth that characterizes the former.

For all the foregoing reasons, the Supreme Court’s decision in Salman reflects a missed opportunity, albeit an opportunity the Court could not have taken advantage of very easily. The legality principle has its constitutional antecedents, but the Court has never upended a statute solely for violating the principle. Instead, the Court has relied on more concrete doctrines such as vagueness and lenity, either to interpret statutes so that they conform to notions of fair warning or, in rare instances, to declare them beyond repair. That, unfortunately, poses a problem for cases like Salman. The insider trading doctrine at issue in Salman was far from vague; the Dirks decision alone provides a helpful roadmap for many would-be traders, and Salman and his kin seemed well aware of that roadmap. Lenity may be a rising star among criminal defense attorneys, but its success is far from assured and will remain so insofar as courts analyze ambiguity not just in regard to statutory language, but also in reference to prior precedents.


Several decades ago, the Supreme Court might have declared the Securities Exchange Act’s prohibition on “manipulative or deceptive devices” too vague to reasonably apply in criminal insider trading prosecutions. Through a series of decisions, however, the Court has eliminated much of that vagueness, at least for a core group of offenders. Thanks to cases such as Chiarella, Dirks, O’Hagan, and now Salman, we all have a fair understanding of what insider trading is, although we still debate its boundaries. Were insider trading solely a civil wrong, this outcome would be commendable. But if we think criminal law is truly exceptional, not just in its power to deprive individuals of their liberty, but because it originates in statutes duly enacted by democratically elected representatives, then we must view this state of affairs with at least a bit of unease.

A few years before his death, Justice Scalia raised concerns similar to these in a statement accompanying a denial of certiorari.88 The denial pertained to the Whitman case tried by Judge Rakoff, whose opinion89 pointedly noted the absence of a legislative definition of insider trading.90 Recognizing that Whitman itself served as a poor vehicle for debating these issues, Justice Scalia nevertheless reminded his audience that the rule of lenity “vindicates the principle that only the legislature may define crimes and fix punishments.”91

One can share Justice Scalia’s anxiety and still agree, more or less, with Salman’s outcome, particularly if one considers Salman not only in regard to Dirks, but also more broadly in relation to federal conspiracy law. The Supreme Court treated Maher Kara’s gift of information to Michael Kara much like most courts would treat one co-conspirator’s decision to “gift” another a kilogram of cocaine. And the Court further treated Salman the very same way it would treat any third person who knowingly joined in an illicit conspiracy. But the Court reached its conclusion not by examining the statutory language of one or more criminal statutes; instead, it examined its own precedent. However comfortably Salman’s behavior fell within the “heartland” of the Supreme Court’s insider trading doctrine, it occupied a judicial heartland, not a legislative one.

One need not pity Salman and his coconspirators. They knew what they were doing and apparently knew they were doing something in violation of the law. The larger problem for Salman is that the Supreme Court let Congress off the hook. And by doing so, it foreclosed the corollary benefits that arise when a legislature sets itself to the task not only of defining crimes, but of differentiating them as well.

Miriam Baer is a Professor of Law at Brooklyn Law School and Associate Director of the Center for the Study of Business Law and Regulation. She previously served as an Assistant United States Attorney in the Southern District of New York (1999-2004). She holds a J.D. from Harvard Law School and an A.B. from Princeton University. This Essay grew out of a Discussion Group on Insider Trading and Salman, hosted by the American Association of Law Schools for its Annual Meeting in San Francisco. The author thanks Joan Heminway and Jon Anderson, who organized the panel, as well as its participants.

Preferred Citation: Miriam H. Baer, Insider Trading’s Legality Problem, 127 Yale L.J. F. 129 (2017),